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depends on the engine size and the transmission type.
1994 Chevy lumina freon type
A 1999 Chevy Lumina 3.1 uses standard R-134a refrigerant. It has been used nearly exclusive in automobiles since R-12 was phased out in 1995.
Says it on the oil cap.
5W-30
Dexron-III
Rack and Pinion with power assist.
It is listed in your owners manual. If you don't have one call a Chevy dealer.
A 50/50 mix of water and antifreeze
Should be a 3.1 V6 in the car. If so...Fram PH3387A
4L60e
no i can not answer this quiestion